Anilin-reducer.



A. H. STEVENS.

NILlN REDUCER.

APPLICATION man MAR. 25

Patented May 28,1918

ATBB B.

ALFRED n. STEVENS, or BROOKLYN, NEW YORK, nssieNcR To sTEvENS BROTHERS, or" NEW YORK, N. Y., a PARTNERSHIP.

ANILIN-REDUCER.

Speccation of Letters Patent. Pwmtd Maly gg, 119ml Application led March 25, 1918. Serial No. 224,452.

To all whom z' may concern:

Be it known that ll, ALFRED H. STEVENS, a citizen of the United States, residing in the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented a certain new and useful lmprovement in Anilin-Reducers, of which the following is a specification.

The invention relates to stirring or mix ing machines such as are employed in the manufacture of anilin and analogous products.

ln they process of `reducing anilin, nitrobenzol is treated with iron lings, hydrochloric acid, and steam, in a suitable tank equipped with horizontally disposed arms by which the mass is mixed. The arms, each usually a single casting, are subjected not only to` the corrosive action of the acid but also tothe erosive or abrasive action of the mass, with the result that the arms are short-lived and must be replaced at short intervals, entailing a corresponding loss economically both in time and material.

The object of the invention is to obviate the above objectionable features by provid* ing Vstirring arms so constructed as to endure the wear for long periods, which may be readily conditioned for further service when partially worn, and the replacement easily and quickly effected.

The invention consists in` certain novel features and details of construction and arrangement by which the above objects are attained, to be hereinafter described and claimed.

The accompanying drawings form a part of this speciflcation` and show the invention as it has been carried out in practice.

Figure 1 is a side elevation of an anilin reducing tank equipped 'with the improved arms, and partly in vertical section.

`The remaining figures are on a larger scale.

` Fig. 2 is a vertical section through the lower portion of the tank, the step for the shaft, and the arms thereon, with portions ofthe latter in elevation.

Fig. 3 is a horizontal section through the tank and shaft, showing the arms in plan view.

Fig. A iS a side view of one of the rabble blades of which the arms are composed.

Fig. 5 is a view of the under face of one of the blades. Y

Fig.` 6 is a vertical longitudinal section of a blade.

Fig. 7 is an elevation showing the lower end of the shaft, seen at a right angle to Fig. 2.

Fig. 8 is a plan View of the under `face of the bar on which the rabble blades are mounted. I

Fig. 9 is a plan view of the under face of the shaft-supporting step.

Similar letters of reference indicate the same parts in all the figures.

A is a cylindrical tank which may be of cast iron, and B is a vertical shaft mounted axially therein, supported at the lower end on a step C and extending through a bearing A2 in a bridge or frame A1 mounted on the ytop of the tank. At the upper end of the shaft is a beveled gearwheel B2 in mesh with a beveled pinion D1 on a horizontal shaft D, mounted in bearings in the bridge A1 and driven by a belt andpulleys, not shown, to rotate the shaft- B in the direction indicated by the arrows in Fig. 3.

The tank has a removable plate or false bottom A3 and a removable lining A* at the lower portion, designed tobe replaced when worn by abrasion or corrosion.

At the eXtreme lower end of the shaft `B is a socket B1 adapted to inclose the step and hold the shaft centrally; the step comprises a Stud C on a rectangular foot C1 having holes C2 in which are received corresponding pins or lugs on the bottom of the tank. The stud C is inclosed in a cylindrical bushing and this fixed bushing is inclosed in a rotat-` sol ing bushing or lining ring B3 within the Socket B1 and held to the latter by a vertical l pin b. The bushing and ring receive the wear of rotation andmay be replaced when worn.

Above the socket -B1 is a rectangular transverse opening b1 through the shaft B in which is received a bar E of rectangular section extending diametrically of the tank and held to the shaft by a locking-pin F extending axially upward from the stud C, projecting a short distance into the opening b1 and engaged in a corresponding hole or recess e in the under face of the bar. The l pin F and -then lowered into engagement with the latter when the hole e is in proper Y opening b1 is of sufficient height to permit the bar to be introduced above the lockinga0.` C3 held to the stud by a transverse pin c, y

- forming the stirring arms'.

relationI thereto, and the locking is completed bytheintroduction of a close ylitting v fillerJ 'intthe opening b1 above'the bar'and serving to prevent an upward releasing movement of the latter.

On each of the projecting ends of the barv offthe bar "E by'presenting'` 'suclr ends `at the openinglff"v provided in the side of theftank A as 'us'u'al Eacharin of theba'r is supplied with its blades lyingl closely'sideby side; the* series 'is "then held Iin lclo'se" contact and against the plane'f'sidefac'es ofthe shaftT B by an onterblade"Hisimilar to but preferabl'y' Wider than the intermediate blades G, andih'aving its head H1 closed on the outerl face, thus forining'a closed pocketfor the"reception of =the' extreme end 'of 'the' bar,

tovhicl'i itis held by'a 'tapered ipin L driven through' 'the hea d and "bari t' n, -l w l, Thus built up the stirring arms are completefan'd perform the-usual functionof su'feepingxclose'to 'the' surfaceof the false bottom"`A3, lifting'andagitating the; mass and effecting the intimate" interniingli'ng ofthe ingredients necessary to insure the desired chemical combinations and changes.

It vill 'be/noted that th'ebarE is completely inclosed and protected'from' both the'corrosive and :"efrosiveaction of the4 mass, thereeconomically'beofsteel if preferred.V v 'rabble blades' Glyin'g closely adj a'- cent the socket "B1 vofKA the Ashaft B preyent any lateral movementofthe fillerJ, thuslinsuring" against"` accidental: displacement of the bar.y

Af'sthe radius "ofhtravelj and rate of1` speed' is "igreater jvfor theiouter" blades of Ethe' :series j Vthanthe" inner, 'th'e" 'latter Wear' more slowly and j be `retained vvhen" the outer blades require renewal, thus"eli'ecting a saving possible with the usual arms, in long single pie'ce'sj and as the castings* forming the' 1n- Vdividual blades"V are comparatively" small, l "'theyinay be lo'f better and ymore 'refractory material 'than ythe usualsingle 'arms'vvithou't greatexpense ,Byfsupporting thetshaft `'reliably on a 'step 4at thebottom"v 1o'fythe tank," it is stifliy held 'against gyra-tory movements, and therefore bottoni" A? in" eXceedingly close" proximitythereto While insured against scraping conf' taetfthjereiwith.

By'l 'protetinfgthe said' C '0f the-Step ver1-d the interior of the socket Bl with the bushing C3 and ring 13"', the period of useful service' of these important portions may be` greatly prolonged, and by making the step removable it can be readily replaced When necessary.

The locking pin F serves the double function of aiding to maintain the shaft'B in" aX-ialf'alinemention the step and of affording a reliable holding means for the bar E in conjunction With-the filler J;

To remove they 'blades thelshaft is turned to presentlone of the composite arms at the opening'A5 of the tankf; the tapered pin 7L 1s driven-out, and the blades may then be 80b slid outn'ardlyof the'end of the bar and may be"` rearranged inreplacing` them or new blades substituted In removing theba r E, both lends are' strippedof blades; the filler J thusfreleased is driven out, the'bar lifted 85S clear" ofthelocking-pinF, -and by an en-` Wise movement is Withdrawn through the opening A5.

Althoughifthe invention is described-as designed forservice in anilinreducers, it

Willffbe understood that it is applicable t0 other fmachines of like character to which it may' be'adap't'ed.

Modifications `'may be madeI in the' forms and proportions of the various portions, 95`

and-'parts 'of the invention may be used Withoutthe Whole.

1. In am'achi'ne-offthe character setl forth',

a tank, a'vertical shaft'therein, av barfmount- 100i ed transversely 'in 5an opening inI said y shaft with its ends projecting oppositely, a series of' rabble blades slid'ably mounted side vby side on' such ends and l inclosing said bar,

a locking-pin `arranged-axially ofsaidsh'aft lot' and engaged in said bar, anda filler-in such opening holding! said locking pin and bar in' ei'iga'gement;

2; In a'machine of thecharacter setforth,

a tank, ay vertical shaft therein',l a bar mount- 1105 ed transversely in an opening in said shaft, with its ends projecting*inopposite'ldirections; alocking-pin arranged axially f of'said shaft and' engaged insaid'bar', a filler in' said' opening' holdingfsaid locking-pin and 115" bar in engagement, a series `of rabbleblades slidably mountedside' by "side" on such ends andinclosing said bar;l andI meansfor'securing the outermost blade of each series'to' saidbar, andfonh'oldingsaid filler in such 120` opening between adjacentiimermost blades of the'twvo series; f

3. In a machine ofthe character' set forth, a tank, a vertical shaft therein, a bar mountedtransvers'ely insaid l'shaft with its ends 125A projecting in opposite directions, a series of intermediate rabble blades'slidably' mounted side by side on suchende and inclosingsaid` b a'rg' and Ian outer 'rabble-'blader foreach serles, having a pocket receiving and "covering" the outer extremity of such ends, and means or securing said outer rabble blades to said 4. In a machine of the character set forth, a tank, a vertical shaft therein having a socket at its lower end and a transverse opening above said socket, a bar extending through such opening and having a central recess in its lower face, a stud in said tank received in said socket, a locking-pin vertically mounted in said stud `and extending from said socket axially of said shaft to and partially across such opening, and adapted to engage such recess, a filler in such opening on the upper face of said bar, and a series of rabble blades slidably mountved side by side on the projecting ends of said bar and inclosing the latter.

5. In a machine of the character set forth, a tank, a vertical shaft therein having a socket at its lower end, a foot removably mounted on the bottom of said tank. and having a vertical stud received in said socket and serving as a step for said shaft, and

stirrer arms extending radially from said shaft.

6. In a machine of the character set forth, a tank, a vertical shaft therein having a socket at its lower end, a foot removably mounted on the bottom of said tank and carrying a vertical stud,a bushing secured to said stud, a lining ring secured in said socket and adapted with the latter to inclose said stud and bushing, and stirrer arms extendingradially from said shaft.

7. In a machine of the character set forth, a tank, a vertical shaft therein having a socket at its lower end, a foot mounted on the bottom of said tank and having a vertical stud received in said socket and serving as a step for said shaft, a bar mounted transversely in said shaft, a series of rabble blades' slidably mounted on the ends of said bar and inclosing the latter and forming therewith oppositely extended stirrer arms.

In testimony that I claim the invention above set forth I afiix my signature.

ALFRED H. STEVENS.

Copies of this patent may be obtained for ve cents each, by addressing the "commissioner of Patente,

, Washington, 1D. C. 

